Pump gear
AssigneeBran & Luebbe GmbH
InventorDirk Petersen
Life of this patent
Estimating the term…
Abstract
A pump mechanism having multiple cylinders, whose axes are situated around a crankshaft to enclose predetermined angles, and whose pistons are each functionally connected to a connecting rod mounted on a crank on the crankshaft, each connecting rod being mounted on its own crank and the cranks having a predetermined angular offset to one another. This angular offset of the cranks is selected in accordance with the angle which the cylinder axes enclose in such a way that the phase shifts between each two pistons of the cylinders actuated in sequence during a rotation of the crankshaft are equally large.
Claims18
A pump mechanism comprising:
- a crankshaft defining a crankshaft longitudinal axis therethrough;
- three cylinders arranged around the crankshaft, each of the three cylinders defining a cylinder longitudinal axis therethrough, each cylinder longitudinal axis extending away from the crankshaft in a substantially radial direction relative to the crankshaft longitudinal axis, adjacent cylinder longitudinal axes enclosing predetermined angles (Wz) in a circumferential direction about the crankshaft longitudinal axis;
- a diaphragm pump head coupled to each of the three cylinders;
- and
- a piston corresponding to each of the three cylinders, each piston being functionally connected to the crankshaft via a connecting rod, a first end of each connecting rod having a main bearing mounted on a crank of the crankshaft;
- wherein each crank has a predetermined angular offset (WK) relative to an adjacent crank, and the predetermined angular offset (WK) is selected in accordance with the predetermined angles (Wz), in such a way that phase shifts between each piston and a sequentially actuated piston during a rotation of the crankshaft are equally large;
- and
- wherein a sum of the predetermined angles (Wz) between adjacent cylinder longitudinal axes, over all of the cylinder longitudinal axes, is equal to 90°, and
- wherein the longitudinal axes of the three cylinders are offset in height relative to one another in a direction along the crankshaft longitudinal axis that corresponds to a thickness of the connecting rod.
Dependencies are inferred from the claim text.